Revelation 9:16

And the number of mounted troops was two hundred million; I heard their number.
BSB · Berean Standard Bible
And the number of the army of the horsemen were two hundred thousand thousand: and I heard the number of them.
KJV · King James Version
The number of the armies of the horsemen was two hundred million. I heard the number of them.

Note literally, “ten thousands of ten thousands”

WEB · World English Bible
And the number of the armies of the horsemen was twice ten thousand times ten thousand: I heard the number of them.
ASV · American Standard Version

Related passages

From the Treasury of Scripture Knowledge, grouped by the word they explain.

the number
Psalm 68:17; Daniel 7:10
horsemen
Ezekiel 23:6; Ezekiel 38:4; Daniel 11:40
I heard
Revelation 7:4